Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Does xml::xslt support an xpath method to select an xml node with an attribute that has spaces in the value? Here is a snippet of my xml file: 
...
<Form id="id24" name="160D999998-98/01" accessRefs="#id3" subType="Par
+t Revision Master" subClass="Part Revision Master">
<Form id="id30" name="09A10-000019/A-AF Engineering Or" accessRefs="#i
+d3" subType="AF Engineering Order E" subClass="AF Engineering Order E
+">
<Form id="id33" name="09A10-000019/A-AF Design/Draftin" accessRefs="#i
+d3" subType="AF Design/Drafting Request A" subClass="AF Design/Drafti
+ng Request A">
<Form id="id36" name="09A10-000019/A" accessRefs="#id3" subType="EngCh
+ange Revision Master" subClass="EngChange Revision Master">
...

[download]
Of these three Form nodes I'd like to select the one with subType="Part Revision Master" Here are my failed approaches: 
<xsl:value-of select=
 "/PLMXML/Form@subType='Part Revision Master']/UserData/UserValue[@tit
+le='cage_code']/@value"/>

<!-- also tried -->


    <xsl:strip-space elements="*"/>

<xsl:value-of select=
 "/PLMXML/Form@subType='PartRevisionMaster']/UserData/UserValue[@title
+='cage_code']/@value"/>

<!-- also tried -->

<xsl:value-of select=
 "/PLMXML/Form@subType='Part#x20Revision#x20Master']/UserData/UserValu
+e[@title='cage_code']/@value"/>

<!-- also tried -->

<xsl:for-each select="PLMXML/Form">
  <xsl:variable name="formtype">
    <xsl:value-of select="substring(@subType,1,4)"/>
</xsl:variable>
  <xsl:if test="$formtype ='Part')">
                   <xsl:value-of select=
 "/PLMXML/Form/UserData/UserValue[@title='cage_code']/@value"/>
    </xsl:if>
</xsl:for-each>


<!-- also tried -->

<xsl:for-each select="PLMXML/Form">
  <xsl:variable name="formtype">
    <xsl:value-of select="substring"/>
  </xsl:variable>

    <xsl:value-of select="$formtype"/>
        <xsl:if test="contains($formtype,'Part')">
                   <xsl:value-of select=
 "/PLMXML/Form/UserData/UserValue[@title='cage_code']/@value"/>
    </xsl:if>
</xsl:for-each>

[download]

Replies are listed 'Best First'.
Re: xml::xslt xpath question
by ikegami (Patriarch) on Jul 06, 2009 at 19:29 UTC

    <xsl:value-of select="/PLMXML/Form@subType='Part Revision Master']/UserData/UserValue[@title='cage_code']/@value"/>

    Missing [, the Form doesn't have a UserData child, and I can't verify from what you've shown that the Form has the right ancestry.

    <xsl:strip-space elements="*"/><xsl:value-of select="/PLMXML/Form@subType='PartRevisionMaster']/UserData/UserValue[@title='cage_code']/@value"/>

    Missing [, the Form doesn't have a UserData child, and I can't verify from what you've shown that the Form has the right ancestry.

    <xsl:value-of select="/PLMXML/Form@subType='Part#x20Revision#x20Master']/UserData/UserValue[@title='cage_code']/@value"/>

    Missing [, the Form doesn't have a UserData child, and I can't verify from what you've shown that the Form has the right ancestry.

    I can't comment the later snippets since I know XPath, not XSLT.

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[d/l]
[select]
      I'll add the full xml below but my biggest challenge is in finding the xpath methods that are available in Perl to select a node by its attributute value - when the attribute value includes space.

      Read more... (21 kB)

[reply]
[d/l]

        Simplified XML: 

        <?xml version="1.0" encoding="utf-8"?>
<PLMXML xmlns="http://www.plmxml.org/Schemas/PLMXMLSchema">
  <Form subType="Part Revision Master">
    <UserData>
      <UserValue title="cage_code" value="98747"/>
    </UserData>
  </Form>
</PLMXML>

        [download]

        You keep mentioning spaces, but I don't see why that would be a problem.

        Did you try fixing the the missing "[" I mentioned? If the first snippet doesn't work with the missing "[ fixed, I suspect a namespace problem. I don't know how XSLT deals with namespaces, so I can't help you there.

        Outside of XSLT, your XPath would be wrong since it references elements in the null namespace while they are in the http://www.plmxml.org/Schemas/PLMXMLSchema namespace.

[reply]
[d/l]
[select]

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